/**
 * Licensed to Jasig under one or more contributor license
 * agreements. See the NOTICE file distributed with this work
 * for additional information regarding copyright ownership.
 * Jasig licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a
 * copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.jasig.services.persondir.support;

import java.util.List;
import java.util.Map;

import org.jasig.services.persondir.IPersonAttributes;

/**
 * @author Eric Dalquist
 * @version $Revision$
 */
public class AttributeNamedPersonImpl extends BasePersonImpl {
    private static final long serialVersionUID = 1L;

    public static final String DEFAULT_USER_NAME_ATTRIBUTE = "username";
    
    private final String userNameAttribute;

    public AttributeNamedPersonImpl(Map<String, List<Object>> attributes) {
        super(attributes);
        
        this.userNameAttribute = DEFAULT_USER_NAME_ATTRIBUTE;
    }
    
    public AttributeNamedPersonImpl(String userNameAttribute, Map<String, List<Object>> attributes) {
        super(attributes);
        
        this.userNameAttribute = userNameAttribute;
    }

    public AttributeNamedPersonImpl(IPersonAttributes personAttributes) {
        this(personAttributes.getName(), personAttributes.getAttributes());
    }

    /* (non-Javadoc)
     * @see java.security.Principal#getName()
     */
    public String getName() {
        final Object attributeValue = this.getAttributeValue(this.userNameAttribute);
        if (attributeValue == null) { 
            return null;
        }
        
        return attributeValue.toString();
    }
}
